Astraea

Astraea is a "Close Combat Angeloid, Type Delta" (地戦闘用エンジェロイドタイプΔ（デルタ）) sent by Man of Synapse to kill Tomoki after he violates one of their rules. She is somewhat an airhead and has limited intelligence due to having low processing power, paying homage to the dumb blonde stereotype. She weighs 48 kilograms and is 159 cm tall. Her wing type is stated to be "Not Variable" and "Super Acceleration". She is the last of the First-Generation Angeloids to break free from Man of Synapse's control by Tomoki's influence. When she is ordered by Man of Synapse to eliminate Nymph, she breaks off her chain and engages in combat with Chaos. She mostly serves as the series' comic relief, alongside Tomoki. The duo often squabble, but will comically end up agreeing with each other on some absurd conclusion. She refers to Ikaros and Nymph using the senpai honorific since she is the "youngest" of the First-Generation Angeloids and is named after the Greek mythological figure Astraea.

Astraea also harbors feelings for Tomoki despite often being a target to his perversions. However, despite her lack of intelligence, she does display a good level of common sense in situations where Ikaros would be clueless about. Ironically, she is also regularly found starving due to the fact that she does not know how to hunt or obtain food by her own means, which was shown when she once buried herself to the ground because she tried to obtain nutrients the way plants did.

Astraea has been described as being the fastest of the Angeloids and having greater close-combat capabilities than Ikaros. However, she is only equipped with close-combat weapons and is therefore extremely vulnerable to long-range attacks. She wields a super-osciliating photon blade called Chrysaor (クリサオル Kurisaoru), which can even penetrate Ikaros's Aegis defense system. For defensive purposes, she uses the upgraded version of Ikaros's Aegis shield called Aegis L (イージス L Ījisu Eru, "L" standing for "left", as it appears on her left arm). Although it is more powerful than the Aegis shield, Aegis L can only deflect frontal attacks, unlike Aegis which creates a shield that covers all angles. Also, Aegis L cannot be deployed for long periods of time due to its massive energy requirements.

Abilities and Weapons
Hyper Acceleration ''- According to Daedalus, Astraea has been described as being the fastest of the Angeloids. Granted with 'Hyper Acceleration' wings, she cannot be beaten in speed by any other Angeloid.''

Battle Power'' - As stated by Nymph and later by Daedalus, Astraea's battle power is greater than even Ikaros's, Daedalus even went as far as saying "an angeloid that can match Delta in close-range combat does not exist". However she is vulnerable against any 'angeloid' with long-range weapons as she has no long-range weapons.''

Chrysaor - a super-osciliating photon blade called Chrysaor, which can even penetrate Ikaros' Aegis defense system.

Aegis L ''- the upgraded version of Ikaros's Aegis shield called Aegis L. Although it is more powerful than the Aegis shield, Aegis L can only deflect frontal attacks, unlike Aegis which creates a shield that covers all angles. Also, Aegis L cannot be deployed for long periods of time due to its massive energy requirements.''

Relationships
Tomoki Sakurai - (Unofficial) master.

Ikaros - She is also a 1st generation 'Angeloid.

Nymph - She is also a 1st generation Angeloid.

Man of Synapse - Former master

Daedalus - Creator of the 1st generation Angeloid.